About the Authors

Allison H. Roy

aroy@eco.umass.edu

Affiliation U. S. Geological Survey, Massachusetts Cooperative Fish and Wildlife Research Unit, University of Massachusetts, Amherst, Massachusetts, United States of America

Lee K. Rhea

Affiliation U. S. Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, United States of America

Audrey L. Mayer

Affiliation School of Forest Resources and Environmental Science and Department of Social Sciences, Michigan Technological University, Houghton, Michigan, United States of America

William D. Shuster

Affiliation U. S. Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, United States of America

Jake J. Beaulieu

Affiliation U. S. Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, United States of America

Matthew E. Hopton

Affiliation U. S. Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, United States of America

Matthew A. Morrison

Affiliation SABIC, Mt. Vernon, Indiana, United States of America

Ann St. Amand

Affiliation PhycoTech, Inc., St. Joseph, Michigan, United States of America

Competing Interests

The work was undertaken by USEPA employees. One of the authors, Ann St. Amand, conducted lab analysis of periphyton for this study under a contract with the USEPA. The paper has undergone peer review through USEPA and the U. S. Geological Survey to ensure that there is no misrepresentation of findings, and the paper makes no recommendations about policy or management. The use of trade names or products does not constitute endorsement by the U.S. Government. The views expressed in this paper are those of the authors and do not necessarily reflect the views or policies of the USEPA. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: WDS ALM AHR MAM. Performed the experiments: AHR ALM MAM JJB AS WDS MEH. Analyzed the data: LKR AHR. Wrote the paper: AHR LKR ALM WDS JJB MEH MAM AS.